Student help put in place (4)
I believe the answer is:
laid
'in place' is the definition.
(laid in place)
'student help' is the wordplay.
'student' becomes 'l' (as in L-plates for learner drivers).
'help' becomes 'aid' (synonyms).
'l'+'aid'='LAID'
'put' acts as a link.
(Other definitions for laid that I've seen before include "(Of dining table) set" , "spread on a surface" , "Placed horizontally on a surface" , "Doze" , "Flattened by wind and rain" .)